Self-lubricating spring.



H. C. EHWIN. SELF LUBRICATING SPRING. APPLICATION FILED DEC. 27. 1915.

Pahemed De@ l1; 119m .Application filed eeeinber 37, 1911.5.

To all wwm it may concern.'

Be it known that l, ltoswnnn C. Enwtii', a citizen of the United States, and a resi dent of the town oi Oak Parli, in the county et Cook and State of illinois, have invented certain new and useful -improvements in Self-Lubricating Springs; and ll d0 hereby declare that the following is a full, clear, and exact description oi the saine, reference being had to the accompanying drawings, and tothe numerals et rein erence marked thereon, which forni a part of this speeiiication.

This invention relates to of seht-lubricating spring wherein inserts are provided between the leaves of the spring, said inserts having channels therein aiording passages for iiow of lubricant along the leaves and from one spring leaf to another through apertures provided in the leaves of the spring.

lt is an object therefore el! this invention to construct a seit-lubricating spring eine ployingd the use ci inserts between each et the leaves of the spring with slots in said inserts affording channels leading between apertures prov.' led through the leaves el? the spring to permit admission oi lnbrieant between ali the leaves opt the spring".

It is also an object et this invention to construct a self-lubricating sprintfj compris-- ing a plurality et leaves apertured near their ends and with iiexible metal inserts between the leaves of the spring, said inserts having slots therein communicating between 'the respective apertures ci l leaves ci the sprintf; whereby a lubricant may be intro-- duced through. one et the leaves ci the spring te flew through the passages atterried between all of the leaves oi the spring` lt is furthermore an important object et this invention te construct a sellubrieating spring having; flexible metal inserts. between the leaves of the spring),r previded with passages to afford channels :tor the tlow ci lubricant lengthwise between the leaves of the spring' and communicating with apertures at the cverlapping ends ci the spring leaves to permit a ilow et lubricant from ene spring leaf to another.

lt is finally an object of this invention te construct a self-lubricating' spring wherein channels are provided between the leaves o'l the spring te permit a 'liew ci lubricant therein and treni between one pair ci spring; leaves tc aneifner,

an improved type Specification of Letters E'atent.

yhe invent'tni {in a nreiferre'd iornil is illustrati-id i' incre 'fully described e dran7- re l is einher 'ntf es ci; in v inventien.

piani cwoii the spring. .n iw ttig ig. ntai, sectional e al.

taken on lin ligg. i

lil" l l is nien 'view et ene ci the spring' lealiv inser 'lF 5 is secticnal Sir-5 cit is siewn in the drawings:

The reference numerals l., 2, 7, 8, and indicate the various curve leaves ci ii easing; length eenstituting,1 the spring, which is of the semi-elliptic type, and laid between the respective leaves of the spring' are metal. inserts also et decreaslength, which are more clearly shown in detail taken on line Fig. 3, denoted respectively by tliefreiierence numerals l0, ll., i2, 1 8-, 1.4;, l5, 16, and ifi:

Each oi the respective inserts is provided with longitudinal sluts therein, egli which one of the slcts in the insert i7, which is shown in detail in Fig. 4f., is denoted by the reference numeral 18, terminating?,r in a rounded aperture i9, and on tliegether side near the middle oii said insert-'f'i's anotl vlr ,longitudinal slot 20, rounded aperture 2l. is provided in said insert l?, as well as in the other oi said inserts and also in the leaves et the spring through which a kingl bolt 23, is insert-,edn 'lacli of the respective inserts between the leaves of the spring is slotted similarly te the insert it, shown in detail in Fig. tween the respective leaves ci the spring which are denote l by the reieren e numerals 2li, 25, 26, /Ei', 2S, 29, end 30. 'Each ci the leaves ott the spring is provided with an aperture therethrengh, the respective apen 'termina "inn/"win 7ation ci a springv e. central aperture 2% 4l, thus affording channels be- 'y tee drawings and hereinaftertures all denoted by the reitereneenurneral lubricant through the apertures 31, the lubricant then fiowing through the respetau tive'channels and apertures which afford communication between the spaces between the leaves of the spring. As shown, the usual spring clips 33, are provided, Which engage around the ends of the uppermost spring leaves l, 2, and 3, and the extreme ends of the uppermost leaf l, are turned over and provided with a bushing 34, therethrough, for attachment of the spring shackles by which the spring is connected in position for use upon a vehicle.

The operation is thought to be obvious from the description.

I am aware that the details of' construction may be varied through a wide range Without departing from the principles of this invention, and I therefore do not purpose limiting the patent granted otherwise than necessitated by the prior art.

I claim as-my invention:

1. In a spring, the combination of the leaves thereof, iieXible metal inserts between said leaves having slots providing channels v apertures of one of between said leaves, said leaves having apertures near their ends out of alinement with cach other and registering with said slots to afford communication between said slots, and lubricant supply said leaves. the combination of a pluof different lengths laid. one upon another, a plurality of flexible inserts of d .iiig'erent lengths corresponding to the length of said leaves, said leaves having apertures therethrough out of alinenient with each other, and said inserts having slots therein registering with said apertures for the passage of lubricant through said spring leaves and between the saine, and lubricant supply means secured in an aperture of one of said leaves.

In testimony whereof I have hereunto 2. In .a spring, rality of leaves subscribed my name in the presence of two subscribing witnesses.

ROSVVELL C. ERVVIN. Witnesses CHARLES W. HILLS, J r., EARL M. HARDINE.

means secured in the 

